package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.google.common.collect.Maps;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private JwtProperties jwtProperties;
    @Autowired
    private UserMapper userMapper;
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {


        String oppenId=getOpenId(userLoginDTO.getCode());
        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if(oppenId==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user=userMapper.getByOpenId(oppenId);
        //如果是新用户，自动完成注册
        if(user==null){
            user=User.builder().openid(oppenId).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        return user;
    }

    /**
     * 根据id查询
     * @param id
     * @return
     */
    @Override
    public User getById(Long id) {
        User user=userMapper.getById(id);
        return user;
    }

    /**
     * 调用微信接口服务，获取微信用户的openid
     * @param code
     * @return
     */
    private String getOpenId(String code) {
        //调用微信接口服务，获取当前微信用户的openid
        //构造发送请求
        Map<String, String> map = Maps.newHashMap();
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        map.put("secret", weChatProperties.getSecret());
        map.put("appid",weChatProperties.getAppid());
        String json= HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject = JSONObject.parseObject(json);
        String openId = jsonObject.getString("openid");
        return openId;

    }
}
